Christie’s Magnificent Jewels auction in New York on December 10 is led by a 5.72-carat fancy intense blue diamond with an estimate of $6 million to $8 million. Also among the top lots are ...

Lot 99: $5,495,000 for a fancy vivid blue cushion-cut internally ... modified brilliant-cut Fancy Vivid Yellow diamond, weighing 133.03 carats, Natural color, VS2 clarity ($41,402 per carat).